DE2162266A1 - Device for preventing workpieces from sagging - Google Patents

Description

PATENT LAWYERS

CHECK ACCOUNT: MUNICH 91139

BANK ACCOUNT: BANKHAUS H.AUFHÄUSER

5/1 i

Case 71-551

loyoda Koki Kabushiki Kaisha, Kariya-shi, Japan

Device for preventing workpieces from sagging.

The invention relates to a device for preventing bending of workpieces during processing by a Grinding machine, and particularly during movement in relation to a permanent support with a horizontal support member and a vertical support member cooperating with a measuring device on the standing. Support in With regard to the completion of the workpiece is provided to a certain diameter.

When grinding a workpiece that has a tendency to sag

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and which has a number of stepped sections successively scaled to different dimensions with the aid of a digital controlled grinding machine without removing the workpiece are to be processed ^ it is common practice to limit the area of the workpiece who is most prone to flexing or receding, with the help of support members or support shoes steady support, and operation of the grinder is controlled by a measuring device, which has a "feeler" or a measuring element, which the processed area of the workpiece touches independently of the fixed support.

However, if the axial length of the respective machined area of the workpiece is very short, the application leads of the support member and the sensor of the measuring device on the same section with a short axial length to an intersection between the support member and the probe.

To overcome these difficulties, the position of the permanent support during the known devices of the grinding process changed to a position in which the support member of the permanent support is not in the work of the Measuring device engages, or the support member of the permanent Support was given by the workpiece simultaneously with the decrease in speed the grinding wheel is retracted to a value at which the workpiece will not be bent. With the well-known Measuring process it is necessary, however, the position of the permanent To change the support during the sole process. For this Basically, it is necessary to use special devices to change the position through which the process and the structure get complicated. In addition, since the support members often engage in places that are different from the places of greatest deflection of the workpiece, it becomes impossible to effectively prevent the workpiece from being bent. The measurement process

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lead to a reduction in the efficiency of the grinding process.

The invention is therefore to an effective device for avoidance the deflection of a workpiece during grinding process directed. A corresponding device is to be created that provides a constant support for supporting the Workpiece and a measuring device, which is attached to the permanent support ", the transverse width of the arrangement should be reduced, so that it is possible to produce a workpiece with a short axial length to a predetermined Grinding diameter.

is intended to be a novel combination of a fixed support and a measuring device with a single contact be created, wherein the measuring device has a measurement accuracy that the devices with two point contacts is equivalent in that a support member of the permanent support is used as a Probe is used.

Furthermore, a combination of permanent support and measuring device be created in which the support members of the permanent support automatically according to the reduction in Diameter of the workpiece are advanced so that bending of the workpiece is effectively prevented, and wherein the measuring device is put out of operation at a point in which it cannot insert and remove the workpiece with special needs.

The device according to the invention for preventing bending of a workpiece comprises a permanent support which is pivotally mounted on a fixed support, a horizontal one Support member and a vertical support member used to support the workpiece, the support members slidably attached to the permanent support, drive

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means for feeding the horizontal support member in Direction of the workpiece and at the same time to pivot the permanent support for feeding the vertical support member in Direction of the workpiece, and a one-point measuring device, which is fixed on the permanent support and the work of the grinding machines according to the measured dimensions of the workpiece, the measuring device comprising a single probe which controls the workpiece at a point diametrically opposite the vertical support member for measuring the) dimension of the workpiece.

The measuring device is returned to and from the measuring position in which the measuring sensor of the measuring device is in contact occurs with the workpiece, the insertion and removal of the workpiece not being hindered in the retracted position will.

In the following, for example, preferred embodiments of the invention are explained in more detail with reference to the accompanying drawings.

Pig. 1 shows a side view of an embodiment of the invention w;

Figure 2 is a view of that in Pig. 1 shown device from the left;

Pig. 3 iat a plan view of the device according to Pig. 1;

Pig. 4 is a cross-section along line IV-IY in FIG Pig. 1;

Pig. 5 is a cross-section along line V-V in FIG Pig. 3.

In Pig. 1 shown preferred embodiment of In accordance with the invention, a slide 1 is provided on the bed, not shown, of a grinding machine. The carriage 1 carries a vibrating table 2, on which a bracket 3 with the help of

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Clamping screws 4 is attached. A permanent support 5 is pivotally attached to the projection of the bracket 3 with the aid of a hinge axis 6. A lower or vertical support member 7 and a horizontal support member 13 are mounted on the permanent support 5 so as to be slidable back and forth. The lower support member 7 is slidably received in a bore at the front end of the permanent support 5 and is hand-drawn in a vertical position Direction with the help of a thread 9 and a handle 10 in a position corresponding to the outer Durohmesser of a Workpiece ¥ set. Like in Pig. 4, rotation of the vertical support member 7 is effected by a pin 12 prevented from engaging in a groove 11 provided on the outer periphery of the support member 7. At the outer end of the vertical support member 7, a strip 8 which engages with the periphery of the workpiece W is attached.

Das.horizontale support member 13 is through a bore of the added standing support 5 and is slidably arranged in the horizontal direction. It is moved with the help of a thread 16, which is provided at the inner end of a feed shaft 15. The horizontal support member is with the help of a handle 17 moved back and forth, which is attached to the outer end of the feed shaft 15 by means of a key 21a. One Rotation of the horizontal support member 13 is prevented by a pin 24 which engages in a hat 23 on the outer Perimeter of the support member 13 is provided. A strip 14 is provided at the outer end of the support member 13. That horizontal support member 13 is adjusted by hand with the aid of the handle 17 and automatically by actuating a piston-cylinder arrangement postponed.

A hollow shaft 18 with a pinion 22 is loosely fitted on the feed shaft 15, and a coupling member 19a is keyed onto the outer end of the shaft 18. The other coupling member 19b, which cooperates with the coupling member 19a, is slidable on the feed shaft 15 in the axial direction by means of a

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Feather key 21 attached to the inside of the handle 17. A spring 20 is between the coupling member 19a and the Coupling member 19t) is provided and pushes both apart. If in this arrangement the retaining screw 17a, which is in the Shaft 15 is screwed, is loosened, the handle 17 and the coupling member 19b by the force of the spring 20 after pressed to the left so that the coupling members are released and the rotation of the handle 17 does not result in a rotation of the hollow shaft 18 leads, but causes a rotation of the shaft 15 and thus the horizontal support member 13 with the help of the screw 16 moved back and forth.

The automatic feed mechanism for the horizontal support member comprises a rack 16 which is formed on the piston rod, which is provided in the piston-cylinder arrangement 25 and which meshes with the pinion 22 on the hollow shaft 18.

When the piston-cylinder arrangement 25 is actuated, the toothed rack 26 shifted in the vertical direction and rotates the hollow shaft 15 via the pinion 22, the coupling members 19a and 19b and the feather key 21 and pushes the horizontal support member 13 according to the diameter reduction of the workpiece W before. The actuation of the piston-cylinder arrangement 25 is also used to move the vertical support member 7 according to the decrease in diameter of the workpiece W upwards. Another shaft 27, which is provided with a pinion 28 which meshes with the rack 26, is rotatable in a horizontal bore provided in the permanent support 5. A bevel gear 29a is at the inner end of the shaft 27 and meshes with a bevel gear 29b, which is attached to the upper end of a vertical Yorschubwelle 30 for the vertical support member 7 is attached, wherein the feed shaft 30 is held in the lower region of the permanent support. At the At the lower end of the vertical feed shaft 30, a feed thread 31 is provided which engages in a contact piece 32.

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The lower end of the contact piece 32 is rounded and is supported by a seat 35 which, in a horizontal area, the bracket 3 is provided. A pin 33 serves to prevent the contact piece 32 from rotating. With this structure When the piston-cylinder arrangement 25 is actuated, the rack 26 rotates the shaft 27 via the pinion 28 and lowers it Contact piece 32 via the bevel gears 29a and 29b and the Yorschubgewinde 31 from. So the permanent support 5 becomes something in the Pivoted counterclockwise about pin 6, making the vertical Support member 7 is moved upwards and the reduced outer diameter of the workpiece W follows.

A one-point contact measuring device 40 is mounted on the permanent support 5 and directed towards the workpiece W and movable back, as indicated schematically in FIG.

An actuating cylinder 36 for the measuring device 40 is on attached to the upper surface of the permanent support 5. An arm 37 for holding the measuring device is at the outer end of the Piston rod of the cylinder 36 attached. The axial movement of the arm 37 is guided by a horizontal guide rod 38, which is connected to the permanent support 5 via a bearing 39. The one-point contact measuring device 40 is on the arm 37 in the vertical Direction adjustable attached.

The measuring device 40 can be designed in any known manner. For example, according to Pig. 5 a single probe 41, which is attached to the outer housing 42 so as to be extendable with the aid of a cross spring 43, and a differential transformer 45 with a core actuated by the feeler 41. A screw 44 is used to limit the movement of the sensor 41. During the grinding process of the workpiece W, the measuring device 40 is actuated in the direction of the workpiece of the cylinder 36 is advanced so that the feeler 41 comes into contact with the peripheral surface of the workpiece. To

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The measuring device 40 ends the sole grinding process retracted by the cylinder 36 into a position in which the insertion and removal of the workpiece is not disturbed.

The device described above operates as follows.

First, the holder 3 is pushed into a position in which the deflection of the workpiece assumes a maximum. Then the lower support member 7 is manually adjusted to contact the peripheral surface of the workpiece by the Handle 10 is rotated. Furthermore, the horizontal support member 13 is adjusted by turning the handle 17 by hand, while the coupling members 19a and 19b remain separated. Then the coupling members 19a and 19b in Intervention brought. The sliding process begins. The measuring device 14 is advanced by actuating the cylinder 36 so that the feeler 41 touches the upper surface of the workpiece a point diametrically opposite the vertical support member 7 touches. At the same time, the piston-cylinder arrangement 25 is actuated and advances the horizontal support member 13 in accordance with the decrease in the outer diameter of the workpiece W. Farther the permanent support 25 is rotated upwards or counterclockwise around the pin 6 by the gate thrust shaft 30 of the vertical support member is rotated. As a result, the vertical support member 7 is at the same time corresponding to the reduction of the diameter of the workpiece raised, so that a predetermined Contact pressure is maintained between the vertical support member and the workpiece. In this way will the workpiece is constantly held and during the grinding process deflection is prevented by the horizontal piece member 13 and the vertical support member 7, while at the same time the Diameter of the workpiece is measured by the measuring device 40. The measuring device 40 is a single point measuring device using a probe 41. Since the measuring device 40 and the vertical support member 7 on the standing support

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5 are attached, corresponding to the reduction in the work ' is pivoted piece diameter, the probe 41 and the vertical support member 7 in the same sense by the Permanent support rotated to an extent that corresponds to the decrease in the diameter of the component. That means that the measuring device 40 acts practically as a two-point measuring device.

Since the measuring device is mounted on the permanent support, the transverse width of the arrangement is reduced, so that it allows is to grind a workpiece with an extremely short axial length to predetermined dimensions by passing it through the Support members is supported. In addition, since the vertical support member acts as a probe, the measuring device can use the high Offer measuring accuracy of a two-point measuring device, although actually only a one-point measurement is carried out. That The pair of support members of the permanent support is automatically operated by a single drive device in accordance with the diameter reduction of the workpiece during the sole process shifted so that it is possible to surely prevent the workpiece from being bent. Since the measuring device in is movably arranged with respect to the pair of support members, it is possible to insert the workpiece without difficulty and to remove without being obstructed by the measuring device, so that the effectiveness of the operation is increased.

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Claims (5)

Claims Device for preventing bending of workpieces with a permanent support, the adjustable horizontal and vertical support members which support the workpiece and a measuring device for measuring the outer one Workpiece diameter, characterized in that that the permanent support (5) is pivotably mounted on a fixed bracket (3) is that the permanent support (5) with a drive device for the advance of the horizontal support member (13) in the direction of the workpiece (W) while at the same time Pivoting of the permanent support (5) for advancing the vertical support member (7) is provided so that the measuring direction (40) is mounted on the permanent support (5), and that the measuring device with a single probe (41) is provided, which is arranged so that he the workpiece at a point opposite the point of contact of the vertical support member (7) touches and determines the dimensions of the workpiece (W). 2. Apparatus according to claim 1, characterized in that a piston-Z ^ cylinder arrangement (25) on the permanent Support (5) is provided which actuates a rack (26) which has a first pinion (28) for actuating a feed thread (31) for the vertical support member (7) and a second pinion (22) for actuating a second feed thread (16) for the horizontal support member (13) drives. 3. Apparatus according to claim 1, characterized in that the vertical support member (7) slidably in a vertical 209826/0750 The bore of the permanent support (5) is added and is provided with a manually adjustable one part screw (9). 4. Apparatus according to claim 2, characterized in that the second pinion (22) is formed on a hollow shaft (18) is, wherein the horizontal support member (13) is actuated by a feed shaft (15) extending through the hollow shaft (18), the feed shaft (15) being provided with a hand-operated handle (17) and a coupling (19a, 19b) is provided between the hollow shaft (18) and the feed shaft (15) for the horizontal support member (13). 5. Gate direction according to claim 1, characterized in that the piston-cylinder arrangement (25) is attached to the permanent support (5) and the movement of the measuring device (40) in the direction of the workpiece (W) and back. 209826/0750 Blank page